Staple-binder



B. JAHN AND E. E. KAHL.

STAPLE BINDER.

APPLICATION FILED JUNE19, 1919.

Patented Aug. 9, 1921.l

JAHN AND EfE. KAHL.

STAPLE BINDER.

APPLICATION FILED JUNE19, l9l9.

Patented Allg. 9, 1921..4

2 SHEETS-suing.

UNITED STATES 'PA-TENT OFF1CE BERTHOLD JAHN AND ERNEST E. KAI-IL, OFNEW4 BRITAIN, CONNECTICUT, ASSIG-NORS T0 THE B. JAHN MANUFACTURING ACORPORATION.

COMPANY, OF NEW BRITAIN, CONNECTICUT,

STABLE-BIN DER.

Specification of Letters Patent. Patented Aug. 9, 1921.'

Application led .Tune 19, 1919. `Serial No. 305,431.

T o all whom t may concern.'

Be it known that we, BERTHOLD JAHN and ERNEsT EMU. KAHL, citizensof the`United States, residing at New Britain, in the county of Hartford andState of Connecticut, have invented certain new anduseful Improvementsin4 Staple-Binders, of which the following is a specification.

Our invention relates to improvements in staple binders, and hasparticular reference to improvements in the staple binder'shown anddescribed in our application filed-November 26, 1916, Serial N o.133,357, and the object of our improvement is to incorporate in a'staplebinder of the form mentioned means for positively holding the end por-vtion of the staple strip that is adjacent the plunger and the coperatingcutting edge of the die portion of the die member in close associationwith the said die member on which it. is mounted when the staple binderis in use and thereby preventing the staple strip from beingaccidentally displaced from the proper vposition for being operated upony the plunger, particularly as by Contact with the plunger in its upwardreturn movement. l

In the accompanying drawing `Figure 1 is a side elevation of our im.

proved staple binder.

ig. 2 is a plan view of the same. Fig. 3 is a side elevation of the leftside plate of the frame, as viewed from the inside.

Fig. 4 is afragmentary side elevation of the right side` plate as viewedfrom the inside.

Fig. 5 is a sectional view on the line 5-5 of Flg. 2, on an enlargedscale.

Fig. 6 is a fragmentary view on a lstill` further enlarged scale ofcertain parts shown in Fig. 5. t c

Fig. 7 is a sectional view on the line 7-7 of Fig. 6.

Fig 8 is a' fra entary sectional view on the line 8-,8 of ig. 6.

Fig. l9 is a side elevation, on the 'same scale as Fig. 1, ofa modifiedform of structure.

Fig. 10 is an inside view of the left side plate of the structureshownin Fig. 9.

F ig..11 is a fragmentary sectlonalview,

of the modified form corresponding gener-l some of the that are commonwith the staple binder shown and described in the application `mentionedcomprise a base 10 having an anvil 11 at one end and a pairof arms 12 atthe other end, in spaced relation, for pivotally connecting with aswinging member and havl ing holes for the pivotal pin 13.

The said swinging member comprises a '70, Composite structure, composedof the die member 15 that is opposed to thelbase l0 and a pair of sideframe plates 14 extending upwardly from the said die member 15 andforming therewith a housing for lnclosing certain parts of the operatingmechanism.

The plunger 16is operatively supported in the front part of the framestructure,.

being engaged with 'ways 17 that are provided on the side plates 14, andis normally held in elevated position by means of the spring 18.

'The plunger 16 'has on the inner side, within the housing formed by theside plates 14 a web or' tin structure 19. the upper portion 20 of whichcoperates with4 Opposed flanges 21 on the side plates 14 for limitingthe -upward movement of the plunger responsive to the action of thespring 18, and the lower portion 22 of'which operates as a .cam devicefor coperating with the swinging dog 23.- ,A

The side plates 14 are formed of sheet material, and the flanges 21 arein the form of inwardly turned portions of the said sheet material.

y' The lower `end of theplunger ll-ias on the l'inner side a cuttingedge 24 for coperatingv with the opposed cutting edge 25 on the end ofthe die member 15 'for severing the individual staples 26 from thestaple strip when the plunger is .forced downwardly, the said lowerend'of the plunger as the movement of the plungerl is Continueddownwardly forcing the severed staple downwardly so that.

the legs or prongsA of the staple will be pushed through the paperslayingiover the anvil 11 and finally clenching the staple in -coperationwith the anvil 11.

The operation described is effected by" means ofa blow on thev handle 27on the top of the plunger 16 and when .released the spring 18 raises the-plunger 16..

gDuring such return movement of the plunger 16 the staple strip is moved-forwardly so as to bring the. end staple 26 of the staple strip' intoposition in the path ofthe plunger 16 suitably to be operated upon'and"the mechanism for e'i'ecting such forward movement or feeding'of'thestaple strip com- Yprises a holding pawl 28 that operates topreventretrograde movementof ,the staple strip and the Afeedingpawl 29 forfeeding the staple stripand that is operatively supported from theswinging .dog 23j The holding pawl 28 is pivotally supported from theside frame member 14 by. means of the pivotal pin 30 and is spring 31.

vided forpositioning the die member 15 and the side frame members orside4 plates 14 relatively vone tothe other and these parts :are

held together by means of a plurality of' screws 36. f' A The upperportion 3 7 ofthe die member 15 is reduced in width relatively to thelower i portion so as to provide a' pair of channels .-38, one on eachside, for the le 4of the staples 26,.inthe usual mannelgt ve middle,

portion of thestaples 26 and the connecting a'ckbone of the 'Sta lestrip resting on the l ipper face of the sai 'upper reduced portion ofthe die member 1'5 .-duiing'the severing operation.,

During vthe return movement of Autheplunger after having severed andclenched a staple the inner face .of the plunger isopposed to thefreshly cut edge of-the staple strip and is extremely .close thereto inall .l cases and these parts may contact one with the other in case ofla sli ht displacement of thesta-ple strip inthe dlreotion towardtheplunger. ,Such contacting is liable to result in displacing the staplestrip so that 1tl would be misplaced in position on the die member 15for proper. coperation with the vfeedlng devices so that the finalresult in some cases wouldbe to clog the machine. -A We nd that thediliculty outlined may be overcome by providing means v:for 'positivelypreventing lifting the staple strip appreciably fromthe proper operatingpositiony on the upper reduced portion 37 of the die member 15 on whichAit is supported and-do provided with a positioning f thisthe-following.mannerz-On the inhang the space of the side channels 38for,

the legs of the staples 26 and spaced above the upper surface 40ofthedie member 15. by a space that ysuiices to permit of freeI movement oftheA staple strip in 'the longitudinal directionA for proper operationand at the same time prevents appreciable liftingmovement of the\staplestrip upwardly from the said upper surface '40.

As .a detail, we prefer to lform the inwardlyV directed overhanging rib39 byl means of an indentation on the outer faceA -of theA side plates14whieh plates, as described, are made ofsheet material.

Thus thetwo ribs 39 'coperate with the Q i upper Vface 40 of thereducedvportion 37 ofthe die member 15 to provide a way for.. Y

the upper portions of the' staples 26 and the staple stri-pgenerallywhichpermits of free movement inthe proper' direction ,forcooperation with the plunger and the feedin mechanism and prevents.displacement suc 'as would interfere with proper operation of the saidplunger andfeedin mechanism.

In the construction described it will be noted thatl the [forward end 41of the rib4 39 is4v opposed 4to the inner face 42 of the plunger 16, so.that by properly positioning the said rib longitudinally the saidforward Y end 41- will serve as a-guide for the plunger. Thisisthezarrangement, with certain additional features pertaining todetails that l is followed inthe structure shown in Fig. 9 and thefollowing figures.. i

Inboth formsof structure the ide por-v tion of the frame Ais composed 'otwo opposed -and inwardly directed vribs 43 that are integral withthe-side frames 14.

. In the structure first described the cross 'section of the plunger 16,,shown in Fig. .8,

is of I-beam form, comprising opposed grooves 44 for the ribs 43. Byproviding guide means coperating with the-inner face 42 of thefplungerit will be noted that a T- shape for the cross section of the plunger16a-as 'shown in Fig. 13 suffices.- Thus the forward end 41, asdescribed, serves as the guide for theplung'er '16 for the lower partthereof. v

plunger 1'6.z .are provided by the-forward v -end-portions 45 of theinwardly turned 1.2

between the inwardly turned flanges or ribs 43 and apair ofjlateralldirected anges or ribs 47 that. are ositioned between the inner faces.of the ri sv 43 and the guide means l plunger may be provided forextending vthe 'ing the said stri guide structure for coperating withlthe inner face 42 of. the plunger, such as thevertical .rib "48adjacent the upper guide 45 and the rib 49 in line therewith'and adjacent the loweliguide 41. The last, named rib 49 l may lemerge with therib 39 so as to form 'therewith a-'combined rib Vof right angled L form,as shown, and which is formed Fby indenting the sheetv material of theside frame plates 14. v A

The ribs 48, one on each side, are formed by indenting the material ofthe plates 14.

Weclalm as our invention 1. A staple binder comprisingea die having acutting edge at one end and having a reduced portionalong one faceforslida-bly supporting a staple strip, a housing connectv ed with the saiddie inelosing `the said reduced portion, feeding mechanism for feedalongthe said .reduced portion containe in the said housing, a plungerAoperatively supported' by-wthe said housing, having a cutting edge forcoperatf lfacesl of the said sideflanges, the .said means being inf-theform ofindented r1 s 1 n .thematerial ofthe-said side plates. q

ing `with the said cutting edge on the die,

andalso having means-for` operating .the-

said feeding mechanism, thefsaid housing comprising' la pairlof sideplates positioned on opposite sides of the said reduced portion, vandinwardly directed'ribs belng provided on Athe inner faces ofthe saidside plates for overhanging the said reduced portion, suitabl of thesaidstaple strip. v

v 2. A staple binder as described in clalm 1, the said side platesbei-ng made of sheet material, and the said' inwardlyV directedA ribsbeing formed by indentation of the lsaid Sheet material. v

3. In combination Vin a staple binde-rta frame, a die incorporated' withthe sald' l frame, a plunger supported in the said frame for coperatingwith the said die, and hav-- ing side flanges for serving as guides',slde plates on the said frame and positioned one y'to engage with theupper face.

on each side of andppposed to the edge plates for 'coperatin'g -with theouter` faces of the said side flanges on the plunger, and

vportions ofthe said 'anges, 'a guide iange .1n theform ofjaninwardly.turned edge being provided on. eachfof vtheysald s1de guide meansv .forcoperating with the inner ide ' I BERTi-IOLD- JHN.

'EnNLEsTn'KAHLQ p

